That was the only one that I found in my Lynx´s All the Birds of the World book that looked similar. And probably it is that species. But maybe these are juveniles? Because Madagascar blue pigeon have generally red around their eyes instead of the white, and seem to have much less white under their bodies. Also the end of the bill of these pigeons seemed thicker than Madagascar blue pigeon´s.
@hawkkeye that’s definitely a pigeon of the Alectroenas group and as there‘re only Madagascar Blue Pigeons kept currently in Europe, it’s this species. And you‘re right, that should be juveniles
